Regular expressions library

The regular expressions library provides an object to represent a regular expression[1], which is a kind of mini-language used to represent pattern matching within strings, a set of algorithms to apply the regular expression to target strings, and a set of helper classes associated with using the results of the application of the regular expression to those target strings.

Main classes

These classes encapsulate a regular expression and the results of matching a regular expression within a target sequence of characters.

basic_regex (C++11)	regular expression object (class template)
sub_match (C++11)	identifies a sub match in the analyzed string (class template)
match_results (C++11)	identifies all matching results (class template)

Algorithms

These functions are used to apply the regular expression encapsulated in a regex to a target sequence of characters..

regex_match (C++11)	try to match a regular expression with a complete string (function template)
regex_search (C++11)	check if a regular expression occurs anywhere within a string (function template)
regex_replace (C++11)	replace occurrences of a regular expression with some other text (function template)

Iterators

The regex iterators are used to traverse the entire set of regular expression matches found within a sequence.

regex_iterator (C++11)	(class template)
regex_token_iterator (C++11)	(class template)

Exceptions

This class defines the type of objects thrown as exceptions to report errors from the regular expressions library.

regex_error (C++11)

(class)

Traits

The regex traits class is used to encapsulate the localizable aspects of a regex.

regex_traits (C++11)

(class template)

Constants

Defined in namespace std::regex_constants
syntax_option_type (C++11)	(typedef)
match_flag_type (C++11)	(typedef)
error_type (C++11)	(typedef)